Sealing wax

Sealing lacquer is a coloured varnish you apply to a screw, nut or adjusting screw to show that it has not been turned since, and to secure it against working loose under vibration. It is used in industry, on adjusted measuring and control equipment and in inspection and quality control. This category belongs to other surface treatment.

All products here are Loctite. The classic choice is Loctite 7400 Varnistop, a red sealing varnish in a 20 ml bottle for use at the workstation or a 500 ml bottle for anyone marking many joints. Red is easy to spot, so a broken seal stands out at once during inspection.

If you need a blue colour or a product that does not run, choose Loctite SF 7414. It is a fast-drying, high-viscosity solvent-based paste in a 50 ml tube. Its thick consistency lets it stay put on vertical faces and overhead. Apply sealing lacquer to a clean, grease-free surface and let it dry fully before the equipment goes into service.